After coming home from a cruise in my 2018 SXT I turned off my radio then turned off the ignition.As I was exiting the car I could hear the radio playing. Car was off and radio screen blank. Had to turn the ignition to acc. and turn the radio off. ( can't remember if the radio was on or off when I turned to acc.) This has never happened before. I usually leave the radio on when I shut the car off, the car shuts off and the radio stops. I don't have anything set up to have the radio keep playing for any set amount of time after shutting off the ignition. I was listening to music through the radio from my phone but I have done that before and nothing like this has happened so I don't see that as having anything to do with it. Seemed pretty weird. Has anyone else have that happen? Maybe just a glitch? Radio is the Uconnect4 with 7" screen.